Rutgersknight Posted February 10, 2019 Report Share Posted February 10, 2019 I have a 1954 Dodge C1-B6 with the 230 in engine and 3 speed manual, I am considering the performance options for this engine and then found the rebuilt 251 engine that Sun Valley has advertised. Is this a bolt in swap? What adjustments - changes have to be made to fit the 25" block into the PU https://losangelesmachineshop.com/chrysler-251-flathead-inline-6-spitfire-engine-rebuild/ Not sure if the extra 21 cubes are really worth the trouble - anybody's thought on this? Thanks Quote Link to comment Share on other sites More sharing options...
59bisquik Posted February 10, 2019 Report Share Posted February 10, 2019 If you search the board, there are quite a few threads on putting the longer engine in. Doesnt look all that difficult. However, is that just a long block for sale? You will still need manifolds at a minimum. I am not sure of what else will swap over. If I was starting with a fresh engine, i would add an upgraded cam shaft as well as dual exhaust and intake. With that being said, what about finding an early V8? The 54 was the first year with a V8 and they aren't that hard to swap in. Quote Link to comment Share on other sites More sharing options...
kencombs Posted February 10, 2019 Report Share Posted February 10, 2019 JMHO, if I were to go to the trouble of installing the longer engine, I'd hold out for a 265. Went through the same discussion with myself a few months ago when I found a 251 MF combine engine. I'm working on my 230 little by little. I'll use it until bigger and/or better appears. A baby hemi would be great! even an early 318. Quote Link to comment Share on other sites More sharing options...
Rutgersknight Posted February 11, 2019 Author Report Share Posted February 11, 2019 OK thanks for the info - if I stay with a Flathead, I would go with a reground cam and hi-compression head from Edgy-Mopar Montana, and then the dual carbs and header setup So I could start with a fresh short block I just got my reprinted Parts Manuals - I am going to look over the V8 conversion, from everything I have read the early poly (scallopped valve covers) and early Hemi are the same block So I would think either V8 would go in. On the 265, I need to keep doing my homework before I decide - I do like the idea of a vintage hop-up on the 6, granted more expensive and less HP than either of the V8's I also like the later 318 Poly - had one in my first car - cool engine! 1 Quote Link to comment Share on other sites More sharing options...
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